Place more than one toy on a table. Have them touch each other and overlap somehow. Make sure that a strong light either from a window or a lamp falls on the objects, casting strong shadows on the objects and the table. Draw the objects large enough so they fill the page and touch the edges. Use a #2B pencil. (This is important – a really hard pencil will make if very difficult to get good blacks in your drawing.) You need to show the shadows that are on the subject(s) – shading is more important here than whether or not the drawing actually looks like the actual toy.
If you can’t find toys, use tools or kitchen stuff (small appliances & tools)
See below for examples. Some of the examples on have one toy, so make sure you have at least two in your drawing. I included those examples anyway because I thought that they were still good examples of the shading and tonal range that we’re looking for!